$$\(\mathrm{f}(x)=4 x+3 \quad \mathrm{~g}(x)=5 x-4\)$$ $$\[ \operatorname{fg}(x)=20 x+p \]$$ Find the value of $$\(p\)$$. $$\[ p=............... \]$$
Exam No：0580_s20_qp_21 Year：2020 Question No：14(a)
Answer:
\([p=]-13\)
Knowledge points:
E2.9.1 Use function notation, e.g. f(x)=3x-5, f:x↦3x-5, to describe simple functions.
E2.9.2 Find inverse functions
E2.9.3 Form composite functions as defined by gf(x)=g(f(x)).
Solution:
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